Prepare Oven and Pan: Set your oven to 350°F (180°C). If using a fan oven, reduce temperature to 160°C. Line a 9×5-inch loaf pan with parchment paper to prevent sticking and ensure easy removal after baking.
Combine Wet Ingredients: In a large mixing bowl, whisk together the granulated sugar, brown sugar, eggs, vegetable oil, water, and vanilla extract. Stir until the mixture is smooth and homogenous. Then, gently fold in the mashed sweet potato until fully incorporated.
Mix Dry Ingredients Separately: In another bowl, sift together the all-purpose flour, baking soda, salt, cinnamon, and nutmeg. This ensures even distribution of the leavening and spices throughout the batter.
Incorporate Dry Into Wet: Slowly add the dry ingredients to the wet mixture, folding carefully with a spatula or spoon. Mix just until you no longer see streaks of flour; avoid over-mixing to maintain a tender texture.
Add Pecans: Fold the chopped pecans gently into the batter. They add delightful crunch and nutty flavor to the bread.
Bake the Bread: Pour the batter into the prepared loaf pan, smoothing the top lightly. Bake in the preheated oven for 50 to 60 minutes. Check doneness by inserting a toothpick into the center— it should come out clean or with a few moist crumbs attached.
Cool and Serve: Once baked, remove the bread from the oven and place it on a wire rack. Allow it to cool completely before lifting it from the pan and slicing.